Port Setting - Planet LRP-822CS User Manual

4.9.7.4 Port Setting

Configures switch ports as trusted or untrusted.
Command Usage
 A trusted interface is an interface that is configured to receive only messages from within the network. An untrusted interface
is an interface that is configured to receive messages from outside the network or firewall.
 When DHCP snooping is enabled both globally and on a VLAN, DHCP packet filtering will be performed on any untrusted
ports within the VLAN.
 When an untrusted port is changed to a trusted port, all the dynamic DHCP snooping bindings associated with this port are
removed.
 Set all ports connected to DHCP servers within the local network or firewall to trusted state. Set all other ports outside the
local network or firewall to untrusted state.
The DHCP Snooping Port Setting screens in
The page includes the following fields:
Object
 Port
 Type
 Chaddr Check
Buttons
: Click to apply changes.
Figure 4-9-37
Figure 4-9-37 DHCP Snooping Port Setting Page Screenshot
Description
Select port from this drop-down list
Indicates the DHCP snooping port mode. Possible port modes are:
 Trusted: Configures the port as trusted sources of the DHCP message.
 Untrusted: Configures the port as untrusted sources of the DHCP
message.
Indicates that the Chaddr check function is enabled on selected port.
Chaddr: Client hardware address.
& Figure 4-9-38 appear.
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User's Manual of LRP-822CS